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Annals of Botany 37: 447-452, 1973
© 1973 Annals of Botany Company

RESEARCH-ARTICLE

Induced Parthenocarpy in the Oil-palm

R. L. THOMAS1, A. K. SETH2, K. W. CHAN and S. C. OOI

Chemara Research Station Layang Layang, Johore, Malaysia
2 Plant Protection Limited Fernhurst, U.K.

Received: 4 July 1972   

Parthenocarpy induced by application of exogenous growth substances to Dura and Tenera oil palms is reported. A range of chemicals are effective to varying degrees; being in roughly decreasing ranked order 2,4,5-TP (virtually complete parthenocarpy), NAA, 2 CPA, 2,4-D, 2,4,5-T, IBA, GA3, 4 CPA, IPA (20 per cent effective); some of these effects are statistically significant, others not strictly comparable. Only IAA was entirely ineffective. Induction could be diagnosed by the flower stigmas not opening and remaining fleshy on the fruit. Some evidence is given for an effect on concentration and of a cumulative influence of 2,4,5-TP. Parthenocarpic fruit bunches possess a lower oil content due to decreased mean fruit size; however, other advantages of parthenocarpy are discussed which would outweigh this consideration.


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